Method of making drilling jars



Aug. 2.1927. f 1,6 11

' P ARB oN I METHOD OF MAKING DRILLING JAHS- I Filed March 17.1924 2 Shem-sheet 1.

g 7 P ARBON METHOD OF MAKING DRILLING JARS 2 Sheets-Sheet 2 Ezra/7116010 Filed March 1'7. 1924' Ottoman,

Patented Aug. 2 1927.

is shown in Fig. 1,

UNITED {STATES 1 1,637,511: .VPATENTA o cE.

PAUL mos, or truLsA. oxLAiioiirA.

ETHO or MAKING "DRILLING JARS.

Application filed March 17, 1924. Serial No. 699,938.

' The present invention relates to the production of drilling jars and resides particobvious to one skilled in the art that the rupture of an element oi the present invention during adrillingoperation will be expensive bothin time and labor and might result in the total destruction of a well. I

Other objects whereby the necessary rope action is obtained and the undesirable features of drilling jarsnow on the market are entirely eliminated will 'appearby refer ence to the accompanying specification. and

drawings.

Reference will be had to the accompanying drawings forming a part of this specification,and wherein like characters of reterence designate corresponding parts through out the several views, in which Fig. 1 is a side elevation of the completed assembled socket;

Fig. 2 is a vertical section through Fig. 1;

Fig. 3 isa side elevation illustrating the manner of inserting the T-head into "the socket according to the first method mentioned; I I

Fig. 4 is a vertical section through the socket shown in Fig. 3

Fig. 5 is a sectional view on line 55 of Fig. 1;

Fig. 6 is a sectional view on line 66 of Fig. 2;

Figs. 7, 8, 9 and steps in assembling a drilling such as according to the third method described. i

Before describing the various steps and methods involved in the production of this jar, attention is directed to Figs. l and 2' for the purpose of obtaining famil arity with the. finished product. In these figures, the body A will be seen to include the lateral opening 13 through which the swivelcd head C is inserted, the latter carrying the cable D. The guard pin 6 extends parallel to the axis of the body and prevents the escape of the swivel. Lower transverse per- 10 illustrate the various tor-ationsa are; arranged for the reception of the conventional pin to prevent the escape oi the swivel to the longitudinal pas- A sage.

The body is elongated for the application of the present T-head connection, and

the lower portion of the body has extending therethrough acontinuation of the longitw dinal passage formed in the upper portion for the reception of a swivel. This passage,

however, is slightlyenlarged from the lower 'walls ofqthe transverse pin perforations,

downwardly asindicated by reference char acter E. Two oppositely arranged lateral passages extend through the wall at F and F for a considerable portion of their length for the reception of the lateral extension fOII'UlII QQ the T -head of the lower section, as

will more clearly hereinafter appear.

' The lower member G includes the body and the upper annular shank. This upper shank includes the flattened head portions formed by the lateral extensions 9, g and the vertical extensions 9, the entire head -being in the tormof a cross. The arms or extensions 7, g, are constructed to fit and I travel within the passages F,.F', extending outwardly and terminating flush with the outer face ofthe body portionA. The upper extension corresponds to the dimension of the enlarged portion of the longitudinal passage to permit the movement of the same therein during the upper movement of the head, it being apparent that the lateral extensions g, 9, at the end of their upper stroke engage the walls 7, f, The upper. I annular shank is of sufiicient diameter to I permit proper clearance during movement within the longitudinal passage.

In Figs. 3 and 4, the first method of assembling this jar is illustrated. In Fig. 3,

it will be seen that the lowerend of the body is cut at H for a distance to equal the length of the enlarged longitudinal passage, or for such a distance as may be necessary to procure the properv expansion of the cut end to permit the introduction of the head of the lower section. able means such as a saw, and the leg portions 8 and 8' are expanded until the heads can be inserted. These legs. 8 and 8 can then be brought together by a hammer or other suitable mechanism, and welded.

The second method for making the jar is This cut is made by any suitillustrated'in Figs. 7, 8, 9 and 10. Both sections of the filling jar are forged and machined with the exception of thefinishing of the pins. As illustrated, the socket section includes a slot of sufiicient dimensions to insert the T-head. This slot includes the necessary lateral passages at a 7 distance spaced from the lower end and as shown in Fig. 10, this portion between the lower terminals of the lateral slots and the ends of the jar sections includes the enlarged portions L. A finished T-head is inserted in the slot and is moved to its upper position to permit engagement at M with the upper wall of the slot, Inserts N are placed in posit-ion between the lower faces of the T-head projection and the upper edges of the enlarged portions L, L. Before inserting the T-head,

the lower part of the socket section of the jar is heated and after the T-head is inserted and these inserts I N are placed in position,

those enlarged portions L, L are hammered "into the slots Q around'the neck 01 the I head. The heated portion is allowed to cool and the shrinkage due to the coolin produces the necessary working clearance.

Should itbe found that the stroke is inflicient, portions of the shoulder R may he machined'oif. During the finishing opera-v "tion, the movable parts may be clamped or wedged into a fixed position.

What I claim as newand useful and desire to secure by Letters Patent is 1. A method of making drilling jars consisting informing a socket member with oppositely disposed slots, forming a stem member with a T-head having substantially'flat sides, heating oneot said members and msertmg the stem member in the socket memher so that the cross bar of the T-head will extend into said slots, and then shaping the heated member to cause the socket member to surround the stem member and prevent the T-head from pulling out of said slots.

2. The method of forming a drilling jar,

consisting in forming a flat T-head section of the jar and maintaining the same in a cold state, forming a socket member with opposite longitudinal slots and with an open ing of suiiicient diameter to permit the insertion of the T-head, heating a portion of the socket member. inserting the T-head section into said socket and the ends of the cross bar of the T-headinto said slots, and shaping the heated portion of said socket member to cause the same to surround the stem of the T-head section.

3. The method of forming a drilling jar,

' serts into the slots between the T- head and PAUL ARBON. 

